FIX: improves handling of filter with invalid tag chars (#17640)

Tags mixin is already filtering a lot of data from the user submitted filter in `createContentFromInput()` which can lead to sk receiving an empty filter while the input actually has a value.

app/assets/javascripts/select-kit/addon/mixins/tags.js

@@ -25,6 +25,10 @@ export default Mixin.create({
   allowAnyTag: reads("site.can_create_tag"),
 
   validateCreate(filter, content) {
+    if (!filter.length) {
+      return;
+    }
+
     const maximum = this.selectKit.options.maximum;
     if (maximum && makeArray(this.value).length >= parseInt(maximum, 10)) {
       this.addError(
@@ -42,18 +46,6 @@ export default Mixin.create({
       return false;
     }
 
-    if (
-      !filter.length ||
-      this.get("siteSettings.max_tag_length") < filter.length
-    ) {
-      this.addError(
-        I18n.t("select_kit.invalid_selection_length", {
-          count: `[1 - ${this.get("siteSettings.max_tag_length")}]`,
-        })
-      );
-      return false;
-    }
-
     const toLowerCaseOrUndefined = (string) => {
       return isEmpty(string) ? undefined : string.toLowerCase();
     };